1 | /* |
2 | * Copyright (c) 1998 Todd C. Miller <[email protected]> |
3 | * |
4 | * Permission to use, copy, modify, and distribute this software for any |
5 | * purpose with or without fee is hereby granted, provided that the above |
6 | * copyright notice and this permission notice appear in all copies. |
7 | * |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
15 | */ |
16 | |
17 | #include "compiler.h" |
18 | |
19 | /* |
20 | * Copy src to string dst of size siz. At most siz-1 characters |
21 | * will be copied. Always NUL terminates (unless siz == 0). |
22 | * Returns strlen(src); if retval >= siz, truncation occurred. |
23 | */ |
24 | #ifndef HAVE_STRLCPY |
25 | |
26 | size_t strlcpy(char *dst, const char *src, size_t siz) |
27 | { |
28 | char *d = dst; |
29 | const char *s = src; |
30 | size_t n = siz; |
31 | |
32 | /* Copy as many bytes as will fit */ |
33 | if (n != 0) { |
34 | while (--n != 0) { |
35 | if ((*d++ = *s++) == '\0') |
36 | break; |
37 | } |
38 | } |
39 | |
40 | /* Not enough room in dst, add NUL and traverse rest of src */ |
41 | if (n == 0) { |
42 | if (siz != 0) |
43 | *d = '\0'; /* NUL-terminate dst */ |
44 | while (*s++) |
45 | ; |
46 | } |
47 | |
48 | return(s - src - 1); /* count does not include NUL */ |
49 | } |
50 | |
51 | #endif |
52 | |